Originally Posted by Arizonian
2. Is the whole beta frame skipping beta test from Blur Busters valid?
You are testing the TestUFO Frame Skipping test at www.testufo.com/#test=frameskipping
correctly, and 85Hz is definitely frameskipping. However, there's a way to make testing easier. Right now, your frameskipping photo is currently currently capturing too few frames; try for a longer camera exposure.
To trick any cheap camera into doing that:
1. Adjust your "Exposure Compensation" setting in your camera to a higher setting; and
2. Lower the brightness of your monitor by a lot. This forces your camera to take a longer exposure.
For easier frameskipping determination, you need to take a picture of at least 1/10th second (capture about 6+ squares), and preferably 1/5th second (capture about 10+ squares) for a more accurate frameskipping analysis. The first visible square should be more than 2 squares away from the last visible square, or it won't easily help you determine frameskipping.Example valid photo of non-frameskipping:Example valid photo of frameskipping:
But yes, very good test of the frameskipping & you have correctly determined your display is frameskipping at 85Hz. I've amended the instructions at www.testufo.com/#test=frameskipping
to also use a longer camera exposure, since it makes it much easier. to detect frameskipping.
Secondary verification tests: The moving photo test at www.testufo.com/#test=photo
should show obvious microstutters on a frameskipping display. (provided your GPU/browser is not the bottleneck, but it appears this is not the case for you as Chrome manages perfect synchronization running as the only window on systems that has everything chrome://gpu is enabled). Frameskipping will be much easier to see when playing VSYNC ON than when playing VSYNC OFF. Strafing left/right at high speeds at close distances to high-detail objects during fully synchronized framerate=Hz VSYNC ON will show microstutters on a frameskipping display.